/*
 * Copyright (c) 2007 Aleksey Nikiforov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Aleksey Nikiforov' nor the names of other contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.lex.input.effects.component;



public class AccelComponent {
	
	private AccelConfig config;
	
	private boolean forceApplied;
	private float speed;
	
	public AccelComponent(AccelConfig config) {
		this.config = config;
	}
	
	public void applyForce() {
		forceApplied = true;
	}
	
	public void update(float deltaT) {
		if (forceApplied) {
			speed = speed + config.f/config.m*deltaT;
		} else {
			speed = speed - config.b/config.m*speed*deltaT;
			if (speed < 0) speed = 0;
		}
		
		forceApplied = false;
	}
	
	public float getSpeed() {
		return speed;
	}
	
	public void scaleSpeed(float factor) {
		speed *= factor;
	}
	
	public void clear() {
		speed = 0;
	}
}
